export const SERVER_RESULT_WINDOW = 60;

const searchable = (server) => [
  server.label,
  server.host,
  server.country,
  server.city,
  server.provider,
  server.protocol,
].filter(Boolean).join(' ').toLocaleLowerCase('ru');

export function filterServers(servers, query) {
  const needle = String(query || '').trim().toLocaleLowerCase('ru');
  return needle ? servers.filter((server) => searchable(server).includes(needle)) : servers;
}

export function serverGroup(server) {
  return server.country || server.provider || 'Другие';
}

export function groupServers(servers) {
  return [...servers.reduce((groups, server) => {
    const name = serverGroup(server);
    groups.set(name, [...(groups.get(name) || []), server]);
    return groups;
  }, new Map())];
}

export function autoServer(servers) {
  return [...servers].sort((left, right) => left.id.localeCompare(right.id))[0] || null;
}